It's a bit hard to know for sure what the actual file size is you can upload, because we currently have a 32Mb stack limit on the bot process. When your bot is compiled it might go over that amount if it has to load a lot of data. Can you paste the error in here?

It does not get to compilation. The uploading itself fails. When I attempt to upload the bot, nothing happens no new version. Then I refresh the page and I see a message that says "error uploading file or file is too large"